By sight, most people can’t tell a 20° angle from a 22-1/2° angle or even a 25° angle, but guessing incorrectly can lead to a tool that no longer cuts well. With a bevel gauge like this one from Richard Kell, you can make sure you’re honing your blade at the correct angle. Don’t confuse this bevel gauge with the adjustable or sliding bevel gauge — only this bevel gauge takes the guesswork out of checking angles.
Made in merry old England, this 2″ disk gauges twelve common angles between 15° to 120°. Although it’s made from solid brass, the round relief in the angle slots help prevent damage to a honed edge. The round hole under the 120° gauge accepts a lanyard or key chain, so you can keep the tool handy when you need it.
Expect to pay about $8 for this bevel gauge — but you’ll know for sure that you’re honing the right angle.